Four-stroke cycle-engine.



J. D. SHAW. POUR STROKE CYCLE ENGINE.

APPLICATION FILED OCT. 19, 1912.

1,104,075, f 1 I Patented July 21,1914.

. I JUAN DIEGO SHAW, OF BUENOS AIRES, ARGENTINA.

FOUR-STROKE CYCLE-ENGINE.

Specification of Letters Patent.

Patented July 21, 1914.

Application filed October 19, 1912. Serial No. 726,739.

To all whom it may concern:

Be it known that I, JUAN Draco SHAW,

citizen of Argentina, residing at No. 870

Venezuela street, Buenos Aires, Argentina, have invented certain new and useful Improvements 1n Four-Stroke Cycle-Engmes,

I 'of which the followingis a specification.

The present invention hasfor object a novel method of distribution for four stroke cycle engines. This novel method is realized by using a rotary cylinder, such as a, situated at the upper part of the ordinary cylinder of engines of the internal combustion type;

The accompanying drawings illustrate the manner of carrying the invention into practice.

In said drawings, Figure 1 is a longitudinal horizontal section of the engine. Fig. 2 is an outer side elevation of the same, the fly wheel having been omitted. Fig. 3 is alongitudinal section of the distributing cylinder, and Fig. '4 is a cross section of Fig. 3.

The distributing device is divided into two parts by a partition b, the ends being left open. The smaller end registers with the tube of the carbureter and the larger one with the exhaust pipe. In the side wall of the cylinder are provided two openings of rectangular shape of a width nearly equal to one eighth of the circumference; these dimensions should be calculated very exactly in order to obtain the highest yield of the engine. These two openings are placed at an angle of 90 one from the other.

The opening 0 corresponds to the carbureter side, and the other opening 0 to that of exhaust. The extremities of the cylinder comprise two parts, d and d of a larger diameter than the central part of the exhaust side, and smaller than the carbureting side, so as to form stops which assist to avoid leakages. Besides, in order to be able 'to tighten any place of leakage in a lateral direction, there are'arranged four pieces 6, placed at four recesses of the cyl inder wall, below which pieces are placed the springs f which act to always press said pieces snugly against the inner wall of the hole which receives the cylinder 0,. An axle g fixed by means of the pin it to the cylinder, imparts to the same a rotary motion.

The piece 6, placed opposite the exhaust.

port, has for purpose to prevent the gas from striking against and heating the opteeth.

posite wall of the cylinder. The end of the cylinder at the carbureting side is smaller than the central part, and that of the exhaust side is larger. The axle g bears at its end, ."on the exhaust side, a toothed piece'j '(Fig. 1), provided with four teeth 41. The

distributing device is driven by a cam 70, with two connecting rods l, at its upper part, and is provided with afinger m,

adapted to engage with a tooth of the piece j. The two connecting rods are pressed against the piece j by means of a spring 0.

The working is as follows:

First periodadmissz'on. -The piston is at its highest position and commences to descend; the cam descends also and by 'means of the connecting rodof the left causes the cylinder a to perform one quarter of revolution, so as to establish communication with the carbureter. Exhaust is kept closed.

Second peri0dc0mpression.-The piston rises and at the same time the cylinder realizes .a second quarter of revolution pushed along this time by the right connecting rod. The cylinder of the engine is closed for the time being.

Third pe'rz'odewplosz'on and em ansion-.- The piston descends and the cylinder performs a third quarter of revolution, being Communication between the cylinder and outside is cutoff. 7

Fourth pem'0dea2haust.-The piston rises and the distributing device realizes the last quarter of revolution under the action of the right connecting rod, so as to open the communication with exhaust.

driven along by the left connecting rod.

I declare that what I claim and desire to secure by Letters Patent, is:

1. In an internal combustion engine, the

combinationof a cylinder having a transverse bore; a crank shaft, a piston rod and said bore and having a transverse partition providing a carburetor chamber and an exhaust chamber, each chamber being provided with an opening one-opening being about 90 in advance of the other and both adapted to communicate with the cylinder; a toothed piece secured to said device and having four backwardly opening undercut teeth; an eccentric rod engaging the eccentrio; and a pair of spring pressed fingers pivoted to said rod and engaging in said null 2, In an internal combustion engine, the combination of a cylinder provided et its upper end with a transverse bore; "piston. in the cylinder; a shaft operativeiy connected therewith; an eccentric on said shaft; a

"cylindrical distributing device snugly disposed in said bore and having a, transverse partition providing a carbureter chamber communicating with the carburetei end with an exhaust chamber communicating with the erhaust, each of said chambers provided with an opening one opening being about 902'in advance of the other each.

' adapted to establish communication between its chamber and thecylindei'; spring pressed packing stri s in. the outer face of said dc' v ce; a. she passing through said device and'pro ectmg at one end; a baflie piece on e I mesons tier. of the teeth; an eccentric rod connected 2 to said eccentric and disposed near said tooth piece; and a pair of spring; pressed fingers pivoted to said rod adapted to engage the said teeth. In testimony whereof I afix my simiatnre in presence of two witnesse JUAN DIEGQ Witnesses: I

J. on NARVA, A. R. Ln'sns.

domes e2? this patenting he obtained 20: five ce' cosh, in addressing the Commissioner of Patents,

- is, It 9. 

